Lighter with electric ignition



Jan. 6, 1959 H. H. QUANDT LIGHTER WITH ELECTRIC zcm'rmn 2 Sheets-Sheet 1Filed Nov. 17. 1955 flaws lf. Ouandt By I William Jan. 6, 1959 H. H.QUANDT LIGHTER WITH ELECTRIC IGNITION 2 Sheets-Sheet 2 Filed NOV. 17.1955 1 76/15 4 1am! t i a B rd/WM United States Patent LIGHTER wrrnELECTRIC IGNITION Hans Hubert Quandt, Karlsruhe, Germany, assignor ofone-half to Rudolf Mohr, Karlsruhe, Germany Application November 17,1955, Serial No. 547,574

Claims priority, application Germany May 23, 1952 11 Claims. (Cl.317-91) The present invention relates to electrically ignited cigarettelighters of the kind in which a liquid or gaseous fuel is ignited by aglowing filament which is energized by a battery or other source ofelectric current.

Where a liquid fuel, such as benzine, is used it is fed to a wick whichis ignited by the filament. gas fuel, such as butane, is used, it isstored under pressure in a container and is discharged through a nozzlewhen the lighter is to be used, the discharging gas being ignited by thefilament.

From one aspect the present invention consists in a lighter havingelectric ignition of the fuel by means of a filament mounted on acarrier slidable by an actuator from a normal position where thefilament is de-energized to an igniting position where the filament isheated by current passing therethrough to ignite the fuel, wherein theburner, which may be a fuel wick or nozzle, and the filament carrier arepositioned in a space surrounded by walls at the top of the lightercasing, said space being normally covered at the top by a movable coverand fuel sealing device which is moved to an open position to expose thewick or discharge the gas by or upon the movement of the actuator tomove the filament towards the igniting position, and wherein one or moreof said walls is/are provided with one or more apertures for theadmission of air to said space to assist the fuel to burn.

The invention also consists in a lighter having electric ignition of thefuel by means of a filament mounted on a carrier slidable by an actuatoragainst the action of a spring from a normal position where the filamentis de-energized to an igniting position where the filament is heated bycurrent passing therethrough to ignite the fuel, wherein the fuel wickor nozzle and the filament carrier are arranged in a hollow head ofelongated shape (in plan) adapted to be mounted on a casing whichaccommodates an electric battery, and the fuel container, the wick ornozzle being positioned adjacent one end of the space within the headand the filament carrier being slidable along guides longitudinallywithin the head, and wherein the top of the head is provided with amovable cover which is moved to expose the wick or nozzle by or upon themovement of the actuator to move the filament towards the ignitingposition, the wall of the head at the end adjacent the wick or nozzlebeing provided with one or more apertures for the admission of air tothe space within the head to assist the fuel to burn.

The invention also consists in a lighter having electric ignition of thefuel by means of a filament mounted on a carrier slidable by an actuatoragainst the action of a spring from a normal position where the filamentis deenergized to an igniting position Where the filament is heated bycurrent passing therethrough to ignite the fuel, wherein the fuel wickor nozzle and the filament carrier are arranged in a hollow head ofelongated shape (in plan) adapted to be mounted on a casing whichaccommodates an electric battery and the fuel container, the wick ornozzle being positioned adjacent one end When a iil of the space withinthe head and the filament carrier being slidable along guideslongitudinally within the head, and wherein the top of the head isprovided with a movable cover which is moved to expose the wick ornozzle by or upon the movement of the actuator to move the filamenttowards the igniting position, the wall of the head at the end adjacentthe wick or nozzle being provided with one or more apertures for theadmission of air to the space within the head to assist the fuel toburn.

The invention further consists in a lighter having electric ignition ofthe fuel by means of a filament mounted on a carrier slidable by anactuator from a normal position where the filament is de-energized to anigniting position where the filament is heated by current passingtherethrough to ignite the fuel, wherein the fuel wick or nozzle and thefilament carrier are surrounded by walls forming part of the lightercasing, one or more of which walls is/ are provided with one or moreapertures adjacent the fuel wick or nozzle for the admission of air tothe burning fuel, and wherein the actuator is slidable on the outside ofa side wall and is connected to actuate the filament carrier by a membermovable in a slot in said side wall, the said slot being covered by theactuator when the carrier is in its normal position and being uncoveredby the actuator when the carrier is advanced to the igniting position toprovide an additional aperture for the admission of air to the burningfuel.

The invention also consists in a lighter having electric ignition of thefuel by means of a filament mounted on a carrier slidable by an actuatoragainst the action of a spring from a normal position where the filamentis deenergized to an igniting position where the filament is heated bycurrent passing therethrough to ignite the fuel, wherein the fuel wickor nozzle and filament carrier are arranged in a hollow head adapted tobe mounted on a casing which accommodates an electric battery and a fuelcontainer, and the carrier is slidable along guides beneath a platewhich, in conjunction with the walls of the head, encloses and protectsthe filament except when the latter is in the igniting position and thefilament projects beyond the edge of the plate, the carrier being movedby the spring at all times, when the actuator is released, so that thefilament lies beneath and is protected by the protective cover plate,and wherein one or more apertures are provided in the wall of the headadjacent the fuel wick or nozzle for the admission of air to the spacesurrounding the fuel wick or nozzle.

According to a feature of the invention, the movement of the filamenttowards the igniting position causes a fuel sealing device (a wick coverin the case of liquid fuel or a nozzle seal in the case of gas fuel) tomove to an open position out of the path of movement of the filament andalso completes the electric circuits through the filament as it reachesthe igniting position. The said movement of the fuel sealing devicemoves a stop into the return path of the carrier so that the stop willprevent the carriers, when the actuator is released, from returningfully to its normal position but will retain it in an intermediateposition where the electric circuit to the filament is open and Wherethe slot in which the actuator slides still remains partly uncovered.The stop may be moved out of the return path of the carrier by theclosing of the fuel sealing device. This may be effected by manuallymoving the actuator to its initial position which moves the stop andcauses the fuel sealing device to close; or the fuel sealing device maybe manually closed thereby moving the stop to allow the carrier toreturn to its initial position and hold the fuel sealing device in itsclosed position.

According to a feature of the invention, the contact for completing thecircuit to the filament is in the form of a leaf spring which is engagedby a contact part of the filament carrier as the latter is advanced, theleaf spring flexing to allow the filament carrier to be further advancedto the igniting position whilst still maintaining the contact.

The filament is preferably made of or coated with a catalytic materialsuch as platinum, whereby the filament will be caused to glow morebrightly, when it comes into contact with fuses of the lighter fuel, soas to facilitate the igniting of the fuel. The position of the fuelfumes in relation to the wick or nozzle may vary for various reasons,for example due to draughts or as the fuel becomes more expended. Inorder to ensure that the filament will, as far as possible, always moveinto a zone where fuei fumes are present, according to a feature of theinvention, the filament is mounted on the movable carrier by which it isadvanced towards the wick or nozzle in such a manner that it is inclinedin the horizontal direction to the normal to the direction of movementof the filament carrier, and preferably also i suring that the filamentwill be moved into a fume zone so that the catalytic action will producethe required brightening of the filament to ignite the fuel.

From another aspect, therefore, the invention consists in anelectrically ignited cigarette lighter of the kind referred to in whicha catalytic igniter filament is movable towards and away from the wickor nozzle, the filament being inclined both with respect to the normalto its direction of movement and with respect to the axis of the wick ornozzle.

The lighter may also incorporate an electric torchlight. To this end asmall electric lamp is incorporated in the lighter and a switch isprovided so that this lamp can be energised from the same battery asenergises the igniter filament.

Another feature of the invention consists in resiliently mounting thewick cap relative to the lighter cover so that when the lighter cover isclosed the wick cap will be pressed resiliently over the wick holder toenclose the Wick and reduce evaporation.

A still further feature of the invention consists in detachably securingthe container for liquid fuel to the underside of the head for exampleby a kind of bayonet joint, whereby the container can be readilydetached from the head by turning, for example through an angle of 90.The fuel container may also be provided with an opening at its endremote from the head through which the container can be charged withfuel, said opening being closed by a closure screw the hand of which issuch that, to remove the closure screw, it must be turned in a directionopposite to that in which the container has to be turned to detach itfrom the head.

Further features of the invention relate to construction of the lighteras will be more fully hereinafter described.

An embodiment of the invention will now be de scribed, by way ofexample, with reference to the accompanying drawings, in which:

Figure 1 shows a perspective View of a combined lighter and electrictorch according to the invention;

Figure 2 shows a longitudinal section through the lighter with the coverclosed;

Figure 3 shows a view of the top of the lighter, partly in longitudinalsection, with the cover open;

Figure 4 shows a section along the line AA in Figure 2;

Figure 5 is an exploded view of the various com ponents of the lighter;

Figures 6, 7 and 8 show a side view, a plan view. and an end viewrespectively of the igniter carrier.

Referring to the drawings, the lighter comprises a head 1 whichaccommodates the lighter mechanism and has a liquid fuel tank 2depending from its underside, the head 1 frictionally fitting into thetop of a casing 3 into which the fuel tank 2 extends and which alsoaccommodates an electric battery or non-spillable accumulator 4 forenergizing the igniter and also the electric torch bulb 5.

The head I is formed as a die-casting of generally hollow boat-shapedform with a wick holder 6 adjacent one end, which end is formed withopenings 7 to admit air to the wick. The openings 7 are preferablyformed as slots extending around the end and sides of the head adjacentthe wick holder 6. The head is formed with a slot 8 extendinghorizontally along one side thereof into which fits the slidingactuating member 9 which is retained in position by the nut 10 screwedon to a projection 11 extending inwardly thereof. The projection 11 isconnected by a spring 12 to the transverse bridge 13 of the head casting1 so that the actuating member 8 will normally be pulled towards theright as shown in Figures 1, 2 and 4.

The top of the head casting 1 is closed by a cover comprising a fixedpart 14 and a movable part 15 hinged to the fixed part by the pin 16.The parts 14 and 15 are also made as die-castings and have the shapesshown more clearly in Figure 5. The cover part 14 is held in position atthe top of the head 1 by the screw 17 threaded into the socket 18 on thebridge-piece 13. A coil spring 19 surrounds the pin 16 and acts in adirection tending to move the cover part 15 to its open position asshown in Figure 3. To the underside of the cover part 15 is secured, bymeans of spigots 20 formed as part of the die-casting, a finger 21 and aleaf spring 22 to the end of which is secured the wick cap 23. The endsof the spigots 20 are rivetted over to secure the parts 21 and 22. Thespring 22 resiliently urges the wick cap 23 over the wick holder 6 whenthe cover part 15 is in closed position as shown in Figure 2.

The cover part 14 is formed on its underside with two channels 24forming a slide for the igniter carrier, the construction of which ismore clearly shown in Figures 6, 7 and 8. The igniter carrier comprisesa top metal plate 25 adapted to slide in the channels 24, to theunderside of which plate are secured, by means of the rivet 26, twoL-shaped metal members 27, 28 and two plates of insulating material 29and 30. The mem ber 27 is in electrical contact with the plate 25 butthe member 28 is insulated therefrom by the insulating plates 29 and 30,the hole in the member 28 through which the rivet 26 passes being oflarger diameter than this rivet so that the rivet and member 28 do notelectrically contact with one another. Across the front ends of themembers 27 and 28 is secured the igniter filament 31., consisting of acoil of platinum wire, n such a manner that the direction of thefilament is inclined both with respect to the plane of the plate 25 andto the normal to the direction of movement of the plate 25 in thechannels 24. The member 27 is formed with a slot 32 which is adapted toengage with the projection 11 when the parts are assembled together sothat movement of the actuating member 9 will move the igniter carrier inthe channels 24 towards and away from the wick 33.

The finger21 on the underside of the movable cover part 15 is adapted toextend through an opening 34 in the part 14 and to be engaged with theplate 25 of the igniter carrier so that, when the igniter carrier is inits retracted position as shown in Figure 2, the finger 2i will beretained thereby so as to hold the movable cover part 15 in the closedposition. When the actuating member 9 is advanced to move the ignitercarrier towards the left (see Figure 3), the finger 21 is released andallows the spring 19 to turn the cover part 15 to the raised position.

When the actuating member 9 is rcieased the spring 12 will retract itand the igniter carrier towards the right until the plate engages withthe finger 21. By lowering the cover part 15 the igniter carrier will bereleased and it and the igniting member 9 will move further towards theright under the action of the spring 12 to retain the cover part 15 inthe closed position. Alternatively, by manually moving the actuatingmember 9 to its fully retracted position, the cover part 15 will beclosed.

Beneath the bridge piece 13 of the head 1 is secured a member ofinsulating material which is moulded to the shape shown in Figure 5. Themoulding 35 has a channel therebeneath into which are fitted in turn ametal contact 36, an insulating plate 37 and a metal contact 38, thesethree members and the moulding 35 being secured to the bridge 13 by thescrew 39. The hole in the contact 36 is larger than the holes in theother members and actually fits around a spigot 40 on the underside ofthe moulding 35 so that the contact 36 is insulated from the contact 38which latter is electrically connected to the metal of the head 1 andhence to the metal of the cover part 14, the plate 25 and the member 27.The battery terminals 41, 42 contact respectively with the contacts 36and 38 when the head is fitted on the casing 3 with the battery 4 inposition.

The contact 36 is provided with an upwardly extending contact finger 43which acts as a leaf spring and is adapted to be engaged by the member28 when the igniter carrier is advanced towards the wick, therebycompleting the electric circuit through the filament 31 and causing thesame to glow. The finger 43 flexes to allow the igniter carrier to beadvanced to the igniting position, adjacent the wick 33 (Figures 3, 6and 7) whilst maintaining the electric circuit. When the actuatingmember 9 is released and returns to its intermediate position with theplates 25 abutting against the finger 21, the member 28 will have movedaway from the finger 43 to open the electric circuit through thefilament 31.

The contact 36 also extends across the bottom end of an aperture in thesocket portion 44 of the moulding 35, which socket is adapted to receivethe torchlight bulb 5 which is held in position by the base contact ofthe lamp engaging with the contact 36 and the glass bulb fitting into anaperture 45 in the fixed cover part 14. Fitted around the internal wallsof the head 1 at the end adjacent the lamp 5 is a U-shaped spring 46having one end bent over and engaging in a slot 47 on the internalsurface of the head 1 and its other end provided with a button 48extending through a hole 49 in the wall of the head. The end of thespring which carries the button 48 has a backwardly bent contact leaf 5Bwhich when the button 48 is depressed is adapted to engage the sidecontact of the lamp 5, part of the moulding surrounding the socketportion 44 being omitted to allow this contact to be made. Thus bydepressing the button 48, the lamp 5 may be illuminated by current fromthe battery 4.

The fuel container 2 is detachably fitted to a spigot 51 east integrallywith and depending from the underside of the head 1 directly beneath thewick holder 6. This spigot 51 has two diametrically opposed fingers 52projecting therefrom which are adapted to pass through correspondingslots formed in an opening 53 in the top of the container 2 when thecontainer is at right angles to its normal position relative to thehead. After the fingers 52 have been inserted through the opening 53,the container 2 is turned through 90 to lock the two parts together. Theunderside of the top surface of the container 2, surrounding the opening53, is made in the form of cam surfaces so that this turning movementwill urge the container 2 upwards to compress a flexible sealing washer54 between the top of the container and the underside of the head 1. Thecam surfaces are pros? vided with stops to limit the extent of turningof the con tainer about the spigot 51.

The bottom of the fuel container is provided with an opening closed by aclosure screw 55 which is so threaded that, to unscrew it from thecontainer, it has to be turned in the same direction as is necessary tosecure the container 2 to the Spigot 51 so that the action of unscrewingthe closure screw 55 will not separate the container 2. from the spigot51. The closure screw 55 holds a. U-shaped spring 56 in position withits limbs at opposite sides of the container 2 and bearing against theinside of the casing 3.

The wick 33 is folded about a strip metal member 57 and the wickassembly is inserted into the wick holder 6 by pushing it upwardlythrough the aperture in the spigot 51. The lugs 58 on the member 57 fitinto recesses in the edge of the spigot 51 to locate the wick assemblyin position, the free ends of the wick being inserted into the container2 which is filled with cotton wool or other absorbent material 59. Themember 57 keeps the wick 33 rigid and at the correct height for ignitionby the filament.

The head 1 is provided with a downwardly depending guide portion 6%) atits end opposite to the fuel containcr, and a spring 61 may be fittedinto this guide portion and be arranged to bear against the inside ofthe casing 3 to assist, in conjunction with the spring 56, infrietionally holding the head 1 and the casing 3 together.

The operation of the lighter is as follows: By moving the actuator 9towards the left (Figures 1-4) the igniter carrier first releases thefinger 21 and allows the cover part 15, under the action of the spring19, to move to the open position shown in Figure 3. Further forwardmovement of the slider causes the metal member 28 of the igniter carrierto engage with the leaf spring con tact 43 to complete the circuitthrough the filament and cause it to glow. The flexible finger 43 allowsthe filament, whilst still glowing, to be further advanced towards thewick until it reaches the igniting position. By reason of the doubleinclination of the filament and the fact that it is glowing as it movesover a short distance adjacent the igniting position, the filament ismoved through regions where the fuel-air mixture varies and a region caneasily be found where the catalytic action of the fuel-air mixture onthe platinum filament is the optimum for causing it to glow brightly andignite the fuei, which then burns at the wick.

The actuator 9 is then released. The igniter carrier, however, does notimmediately return, under the action of the spring 12 to its initial ornormal position but is retained by the finger 21 in an intermediateposition in which the contact 43 is disengaged from the member 28 sothat the filament is de-energised. This partial return movement to theintermediate position is relatively short so that even with a suddenrelease of the actuator 9, there is no harmful impact on the hotfilament, as would be the case if the spring 12 accelerated the ignitercarrier right back to its initial or normal position whilst the filamentwas still hot. When in this intermediate position, as when in the normalposition, the filament lies beneath the cover part 14, which acts as aprotective cover plate therefor. The filament is only exposed when it isin or adjacent the igniting position and projects beyond the edge of thecover part 1-4.

When the actuator 9 is in the intermediate position, the slot 8 ispartially uncovered and serves as an opening, additional to the openings7, for the admission of air to the burning fuel.

The flame is extinguished when the cover part 15 is closed either by thefinger, in which case the finger 21 is moved to a position whichreleases the igniter carrier, or by moving the actuator 9 to the right,in which case the igniter carrier pushes the finger 21 and causes thecover part 15 to close. The igniter carrier is thus moved below thefinger 21 and the cover part 15 is secured in the closed position.

This application is a continuation-in-part of my co pending applicationSerial No. 354,838, filed May 13. 1953.

I claim:

1. Lighter comprising a container for volatile, inflammable liquid fuel;a wick arranged to be fed with fuel from said container; a casing forhousing said container; a head member assembled on said casing, asupporting plate on the head member, a lid pivotally mourred on thesupporting plate and adapted to move from a closed position overlyingthe wick to an open position; said lid being formed as a double-armedlever having a first arm carrying a means for sealing the wick and a lugforming a second arm which is shorter than said first arm and extendsbeyond the pivotal point of the lid; guide means arranged on theunderside of the support ing plate, an igniter carrier carrying anigniter wire said igniter carrier being adapted to slide along saidguide means from a rest position to an igniting position near the wick,in open position of the lid, and back to the rest position in which thecarrier is located under the lug and is adapted to lock the lid in itsclosed position, a handle slidable externally of the head, and a pinconnecting said handle and said carrier for causing movement of thecarrier by manual movement of said handle 2. Lighter as claimed in claim1, in which the pin and handle are held in the rest position by aspring.

3. A lighter comprising in combination, a head memher having asubstantially horizontal supporting plate, a two-armed lever pivoted tosaid supporting plate, said twoarmed lever having a long arm and a shortarm formed as a lug, said two-armed lever being movable between a firstposition in which said lug is substantially vertical with respect tosaid supporting plate and projects below the same. and a second positionin which said lug and said long arm are substantially horizontal; and aslide movably arranged underneath said supporting plate be tween two endpositions, said slide in one of the end positions thereof being inengagement with said lug and pressing the same into said secondposition; and in the other end position thereof releasing the lug andallowing the lever to move to its vertical position.

4. A lighter as claimed in claim 3, a pin connected with said slide, aslot in one of the side walls of said head member; and a handle arrangedoutside said side wall of said head member and connected with said pinand being movable substantially parallel to said slot in said side wallof said head member.

5. A lighter as claimed in claim 4, and a tension spring connected tosaid pin, said tension spring urging said pin into the end positionthereof corresponding to said one end position of said slide.

6. A lighter comprising a combination, a hollow head member, a wickarranged within said hollow head memher and towards one end thereof, asupporting plate partially covering the top of said head member andleaving an opening above said wick, a lid pivotally mounted on thesupporting plate and adapted to move from a closed position in which thelid closes the opening above said wick, to an open position, said lidbeing formed as a double arm lever of which the longer arm is adapted tooverlie said opening when the lid is closed and carries means forsealing the wick when in the closed position, and the second arm ofwhich is shorter than said first arm and extends beyond the pivotalpoint of the lid, guide means arranged on the underside of thesupporting plate, an igniter carrier carrying an igniter wire, saidigniter carrier being adapted to slide along said guide means from arest position to an igniting position near the wick, said carrer when inthe rest position being located beneath the shorter arm and holding thelatter in the closed position of the lid, and when in said ignitingposition releasing the shorter arm and allowing the lid to move to itsopen position, a horizontal slot in a side wall of the head member, ahandle movable in said slot, means connecting the handle, and carrierfor causing movement of the carrier by movement of the handle, and aspring for urging the carrier towards its rest position.

7. A lighter comprising an elongated hollow chamber open at its top, afuel burner arranged within said hollow chamber and towards one endthereof, apertures in a wall of the chamber adjacent said burner for theadmission of air to assist the fuel to burn, a supporting platepartially covering the open top of said chamber and leaving an openingabove said burner, a lid pivotally mounted on the supporting plate andadapted to move from a closed position in which the lid closes theopening above said burner to an open position, said lid being formed asa double-armed lever of which the longer arm is adapted to overlie saidopening when the lid is closed and carries means for sealing the burnerwhen in the closed position, and of which the second and shorter armextends beyond the pivotal point of the lid, a first spring urging thelid to its open position, two guide rails arranged on the underside ofthe supporting plate, an igniter carrier carrying an igniter wire, saidigniter carrier being mounted to slide along and between said two guiderails from a rest position to an igniting position near the burner, asecond spring for urging the carrier towards its rest position. meansfor completing an electrc circuit through the igniter wire as it reachesthe igniting position, said carrier when in the rest position beinglocated beneath and engaging the said shorter arm, thereby holding thelid in its closed position, and when in the igniting position releasingthe shorter arm and allowing the lid to be moved by said first spring toits open position in which the shorter arm extends between said twoguide rails and forms a stop for retaining the carrier in anintermediate position, between the rest and igniting positions, in whichintermediate position the igniter wire lies below and is protected bythe supporting plate and the electric circuit to the igniter wire isopened, and an actuator slidable on the outside of a wall of saidchamber and connected to move the carrier by a part movable in a slot insaid wall, said slot being covered by the actuator when the carrier isin its rest position and being uncovered by the actuator when thecarrier is in the igniting and intermediate positions to provide anadditional aperture for the admission of air to the burner.

S. A lighter as claimed in claim 7, wherein the hollow chamber isconstructed as a hollow metal head adapted to be mounted at the top of acasing adapted to enclose an electric battery, a moulding of insulatingmaterial secured to the underside of the head and carrying two batterycontacts which are insulated from one another and are adapted to engagethe contacts of the battery when the head is fitted to the casing, oneof said battery contacts being electrically connected to the head andthe other contact carrying a leaf. spring which is adapted to engagewith a metal part of the igniter carrier as the latter is advancedtowards the igniting position, said part being insulated from anothermetal part of the carrier which slides in the guides and thus forming aninsulated contact on the carrier to which one end of the igniter wire isconnected, the other end of the igniter wire being connected to themetal part of the carrier which slides in the guides and thus beingelectrically connected to the head.

9. A lighter as claimed in claim 8, wherein the insulating member alsocontains a socket for receiving the cap of a small electric bulb whichis retained in position in the socket by the supporting plate, the endcontact of the bulb engaging with the insulated battery contact on theunderside of the moulding and the circuit to the side contact of thebulb being completed by a leaf spring mounted within and in electricalcontact with the head 9 10 and adapted to be moved into engagement withthe side References Cited in the file of this patent contact of the bulbby a member projecting externally of UNITED STATES PATENTS the head.

10. A lighter as claimed in claim 9, for use with petrol gl f fuel,wherein a wick holder is cast integrally with the l uzpam head and hasan aperture extending vertically there- FOREIGN PATENTS through- 639,80!Germany May 24, 1929 ll. A lighter as claimed in claim 10, wherein theOt- 857,601 France Sept. 21, 194 tom end of the wick holder is providedwith fingers m 592,657 Great Britain Sept. 24,1947 adapted to engagewith an aperture in the top of the fuel 276,804 Switzerland July 31,1951 container in the manner of a bayonet joint. 996,025 France Dec. 12,1951

